The Kaiju is big and shaped like a monster or robot depending on which character you choose. Due to the graphics, which are rather cartoony, they never look scary or disturbing.
The kaiju never really react to the violence. Hits are just counted as percentages that are ticked of the total value. When this reaches 0, the game stops with a slow motion effect and highlights the hit that made the ticker end at 0.
During the battle you can shoot small helicopters and other mechanical objects to gather stars. With these stars, you can buy special attacks or power ups. The characters that you shoot down disappear after a few shots in a small explosion.